Comparison of the semi-solid constitutive behaviour of A356 and B206 aluminum foundry alloys

Sheykh-jaberi, F.; Cockcroft, S. L.; Maijer, Daan M.; Phillion, A.B.

doi:10.1016/j.jmatprotec.2018.10.029

Cited by 32 publications

(15 citation statements)

References 20 publications

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“…where K(T) is the consistency of the alloy (at e = 1, _ e= 1 s À1 ), r(T) is the hardening parameter, and m(T) is the strain rate sensitivity of the alloy, and the value is inversely proportional to n in Eq. [7]. These parameters are temperature dependent.…”

Section: B Alsim Constitutive Equationsmentioning

confidence: 99%

“…[1] through [5]) show that the constitutive parameters that need to be extracted and optimized are the rheological parameters p, a 0 , a 1 , g s coal and k. Since the parameters of the solid part of the alloy (represented by creep law properties, Eqs. [7] and [8]), i.e., r 0 , _ e 0 , Q and n, were obtained in our previous work, [24] in this study we focus on obtaining the constitutive parameters for the semi-solid part of the constitutive model by utilizing the ALSIM package.…”

Section: Constitutive Parameters Extraction Proceduresmentioning

confidence: 99%

“…To describe the solid part of the model (Eqs. [7] and [8]), the parameters obtained in our previous work were used. [24] For the semi-solid part, we used the Al-2 wt pct Cu semi-solid database [28] as an initial guess because of its availability and its similarity to AA7050 in terms of HT susceptibility.…”

Section: Constitutive Parameters Extraction Proceduresmentioning

confidence: 99%

“…Susceptibility of the alloy to HT depends on both microscopic and macroscopic features of the alloy. Grain size (including secondary dendrite arms spacing) [7] and the presence of harmful intermetallics in the structure [8] may affect the HT susceptibility. Meanwhile, the chemical composition [9] affects the semi-solid mechanical behavior of the alloy [6,[10][11][12] through the phase composition but also through the freezing range of the alloy [6,9] -the wider, the more susceptible to HT.…”

Section: Introductionmentioning

confidence: 99%

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Semi-solid Constitutive Parameters and Failure Behavior of a Cast AA7050 Alloy

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Eskin

Miroux

et al. 2021

Metall Mater Trans A

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AA7050 is an aluminum alloy with superior mechanical properties; however, it is prone to hot tearing (HT) during its production via direct-chill casting. This study focuses on extracting constitutive parameters of the alloy thermomechanical behavior in semi-solid state as well as gaining insight in its failure behavior. Tensile tests were performed using an Instron 5944 at solid fractions between 0.85 (550°C) and 1.0 (465°C), at deformation rates of 0.2 and 2 mm/ min. The results showed that there are three mechanical behavior regimes in this solid fraction range: ductile at 1.0 (T = 465°C) £ f s <0.97 (T = 473°C), brittle at 0.97 (T = 473°C) £ f s £ 0.9 (T = 485°C) and then ductile again (at 0.9 (T = 485°C) < f s £ 0.85 (T = 550°C)). Fracture surface analysis revealed that the fracture mode was mostly intergranular with fracture propagating through solid bridges as well. Semi-solid constitutive parameters were obtained by making a simple thermal model and numerical tensile tests in ALSIM software package and comparing the simulation results with experimental mechanical tests. The extracted constitutive parameters and available information from the literature support the fact that AA7050 is more susceptible to HT than AA5182 and Al-2 wt pct Cu alloys. The obtained parameters can further enhance the predictive capability of computer simulations of direct-chill casting.

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Section: B Alsim Constitutive Equationsmentioning

confidence: 99%

Section: Constitutive Parameters Extraction Proceduresmentioning

confidence: 99%

Section: Constitutive Parameters Extraction Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Semi-solid Constitutive Parameters and Failure Behavior of a Cast AA7050 Alloy

Subroto

Eskin

Miroux

et al. 2021

Metall Mater Trans A

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“…14,15) To overcome these problems, several studies have been conducted to estimate stress-strain curves during partial solidification using numerical methods. 1623) Among them, Phillion et al 16,17) experimentally validated the elastic region of the stress-strain curve, while Sheykhjaberi et al 23) compared the experimentally obtained yield stress with the numerical value.…”

Section: Introductionmentioning

confidence: 99%

Viscosity Properties Prediction of Semi-Solid Aluminum Alloys Using Finite Element Analysis Based on Quenched Solidified Structure, and Experimental Validation

et al. 2020

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For predicting hot tearing during casting process, viscosity properties and constitutive equations in the semi-solid region are required. In this research, viscosity properties of two alloys, which are Al5 mass%Mg alloy with TiB grain-refiner and Al2 mass%Cu alloy with TiB grain-refiner, are estimated using the image-based modelling method as suggested by Matsushita et al. As to the mechanical properties of the solid phase in semi-solid region, it is found that by using the temperature dependent value rather than the value just below the solidus temperature, the prediction accuracy of the viscosity value in semi-solid region has increased. By comparing the obtained numerical properties with the experimental properties, it is found that the method can predict the viscosity properties of Al5 mass%Mg alloy and Al2 mass%Cu alloy in the semi-solid region at the solid fraction where hot tears are likely to occur.

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Tensile-Microstructure Evaluation for LM6 Alloys Synthesized by Solid–Liquid Mixed Casting

Agarwal

Singh

et al. 2022

Recent Trends in Design, Materials and Manufacturing

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Comparison of the semi-solid constitutive behaviour of A356 and B206 aluminum foundry alloys

Cited by 32 publications

References 20 publications

Semi-solid Constitutive Parameters and Failure Behavior of a Cast AA7050 Alloy

Semi-solid Constitutive Parameters and Failure Behavior of a Cast AA7050 Alloy

Viscosity Properties Prediction of Semi-Solid Aluminum Alloys Using Finite Element Analysis Based on Quenched Solidified Structure, and Experimental Validation

Tensile-Microstructure Evaluation for LM6 Alloys Synthesized by Solid–Liquid Mixed Casting

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